I speak Ka Fa( Hakka) (Dapu variant) and Hokkien (Minnam) fluently since young. 'Khiu meh' is Ka Fa (Hakka) whereas 'khim' is Hokkien. I have many friends who speak Yon Ding Hakka ( Fukien variant). There is very little difference between the Fukien Hakka and Mexian or Dapu Hakka. The terminologies are the same. Actually, 'hakka is yue (Cantonese) in origin. It should sound more like 'kakka'. Kak means guest as in kak ngin.